baber/WOPTO huggingface dataset:
Patent GB-749523-A (GB)
Title: Improvements in and relating to electrical measuring instruments
Inventor: HULLS LEONARD ROBIN
IPC: G01R1/30
Filed: 1953-07-09
Abstract: 749,523. Electrical measuring instruments. ENGLISH ELECTRIC CO., Ltd. July 9, 1954 [July 9, 1953], No. 19054/53. Class 37. In an electrodynamometer instrument comprising mutually inclined coils in a magnetic field, the coils are fed from input sources over amplifying circuits to provide a linear response. The coils 1, 2 are arranged in the cathode circuits of cathode followers 10, 18, Fig. 1, so that no load is reflected into the grid circuits. As shown, the battery 4 causes current to flow through the apparatus 3, a voltage proportional to the current being established across resistor 9 and applied over smoothing circuit 7, 8 to the grid of discharge tube 10. A voltage proportional to the battery 4 is tapped off potential divider 16, 17 and applied to tube 18 so that a corresponding current flows in coil 2 and the deflection of the instrument gives the resistance of apparatus 3. By switching in various values of resistor 9 other resistance ranges may be obtained. In order to measure current, switch 6 is turned to the central position and a constant voltage from divider 27, 28 across stabilizer tube 26 is applied to tube 18 so that a constant current flows in coil 2. The current in resistor 9 causes a corresponding voltage to be applied to tube 10 to give an appropriate current in coil 1 and a deflection of the instrument. In the remaining position of the switch, the current in coil 1 varies with the voltage across resistor 16 so that the deflection is a measure of the battery voltage. Operation of the switches 29, 30 allows the instrument to be adjusted for zero and infinite resistance on the scale by means of resistors 24, 15. Compensation of standing current. In a modification, Figs. 3 and 5, the coils 61, 62 are arranged with compensating coils 65, 66 mounted in a parallel manner and fed with current through adjustable resistors 71, 72. In a further modification, Fig. 4 (not shown), a single coil is mounted between the two main coils. Alternating current. The A.C. may be amplified and then fed to a cathode follower feeding a rectifier bridge, Fig. 6 (not shown), the coil being arranged across the opposite diagonal. By feeding the bridge over a capacitor, standing D.C. is eliminated and no compensation is required. Reference has been directed by the Comptroller to Specification 695,587.
Patent GB-659880-A (GB)
Title: Improvements in or relating to electrical measuring bridge circuits
IPC: G01R17/00
Filed: 1949-07-20
Abstract: 659,880. Bridge circuits. DUBILIER CONDENSER CO. (1925), Ltd. (Bailey, J. T.). July 20, 1949, No. 19107. [Class 37] An A.C. bridge circuit includes a two-wayrectifier connected to the A.C. source and comprising a pair of grid controlled rectifier circuits and a common D.C. output circuit, a device for measuring the current in the output circuit, and means for controlling the rectifier circuits connected across the second diagonal of the bridge circuit. The bridge comprises a pair of ratio arms R4, R5, the unknown impedance in the form of a condenser Cx, and a standard impedance comprising one of a number of selectively connectible fixed condensers C1, C2, C3. Standard inductance coils L1, L2, L3 and standard resistances R1, R2, R3 are also provided for inductance and resistance measurements. The standard impedance is selected by means of a multiple switch A<SP>1</SP>. As shown, the impedance ratio between the arms R4, R5 is varied by means of an adjustable contact A2, or alternatively the standard impedance may be variable and the ratio between the arms R4, R5 maintained constant. The bridge is supplied from an A.C. source through lines. L and a plug P by way of series resistances R6, R7. The other diagonal points A1, A2 are connected to the cathode C and control grids G1, G2 of a double-triode amplifier valve T through a coupling condenser C4 and grid leak R8. The anodes P1, P2 of the valve T are connected to the A.C. supply through resistances R9, R10. The anode circuits are completed through a connection between the cathode C and the contact A2, a microammeter I being included in the circuit. The contact A2 is provided with a pointer moving over scales S1, S2, S3 calibrated in units of the respective impedances to be measured. When the bridge is balanced no potential is applied to either grid G1, G2 of the double-triode T, which acts as a double wave rectifier and allows unidirectional current to pass through the return circuit including the indicator I, the amplitude of this current being adjusted to a predetermined maximum value by adjusting the series resistances R9, R10. If the bridge is unbalanced an alternating voltage is impressed on the grids G1, G2 and a decrease in the meter current results. Contacts A2 is then adjusted until. the current through the meter I reaches its predetermined maximum value. In a modification the anodes P1, P2 are connected to the centre-tapped secondary of a transformer whose primary is energized from the A.C. source, the centre tapping providing the return path through a measuring instrument and a series impedance.
Patent GB-992007-A (GB)
Title: Electromagnetic relay
IPC: H01H50/20
Filed: 1961-05-26
Abstract: 992,007. Electromagnetic relays. TEXAS INSTRUMENTS Inc. May 26, 1961 [May 27, 1960], No. 19132/61. Heading H2B. An electromagnetic relay has a plunger type armature 122 with a shank 124 carrying a movable contact bridge 132 biased against the lower end of the armature body by a variable rate spring 154. Contacts 140, 142 on the bridge 132 co-operate with fixed contacts 30, 32 in chambers formed in the casing part 22 which is recessed to increase leakage paths. A weight 162 rests on the armature 122 and permits increased ampere-turns to be used to increase the contact pressure without rebound or vibration. When the coil 172 is energized the armature carries the weight upward but at the instant of contact engagement the weight continues its upward movement due to its inertia and the attractive force is applied solely to the armature contact assembly. The fixed contacts 30, 32 are mounted on terminal members 34, 36 which, in common with winding terminal member 38, is secured in recesses 40, 42, 44 by the engagement of projections 78, 80, 82 on a cover member 24 in apertures 73, 74, 76 in the terminal members.
Patent GB-448151-A (GB)
Title: Improvements in and relating to electrical condensers
IPC: H01G4/14
Filed: 1935-07-04
Abstract: 448,151. Condensers. PLESSEY CO., Ltd., Vicarage Lane, Itford, Essex. July 4, 1935, No. 19167. Convention date, July 23, 1934. [Class 38 (ii)] [See also Group V] A condenser dielectric consists of a reaction-compound of rubber and oil, preferably coated on to the electrodes. The compound may be made by reacting together equal weights of pure gum rubber with hot or boiling vegetable oil such as partially polymerized tung oil. Soya, cashew, menhaden and sardine oils are also mentioned. Preferably a condenser utilizing the rubberoil compound as dielectric has off-set rolled foils 11, 12, of a thickness not greater than 0À0005 inch and the rolled condenser is baked at approximately 200‹ C. The projecting ends of the foils are metal sprayed, preferably with cadmium 21, and leads 20 may be attached to these consolidated ends.
Patent GB-638435-A (GB)
Title: Improvements in or relating to the production of alloys of an alkali metal and lead
IPC: C22C11/02
Filed: 1947-07-18
Abstract: 638,435. Continuous casting - machines. JOHNSON, A. A., (trading as JOHNSON & CO., A.). July 18, 1947, No. 19216. Convention date, April 22, 1943. [Class 83 (i)] Moulds.-An alloy of an alkali metal and lead is made in a form suited to lead alkyl synthesis by rotating a cooled grooved roller 13 while dipped in a bath 12 of the molten alloy and continuously removing the solid alloy which breaks up longitudinally and transversely into pieces 22 of equal size. The roller may be precoated with a lower melting point metal or alloy and is cooled internally by liquid sprayed from a pipe 14. It is enclosed in a casing 18 which is filled with inert gas and supplied with molten alloy at 11 and has an outlet at 17 to pass the pieces 22 without admitting air. The Specification as open to inspection under Sect. 91 comprises also machines with rollers 13 having semi-circular or V-shaped grooves. This subject-matter does not appear in the Specification as accepted.
Patent GB-1167471-A (GB)
Title: 3-[(5-Nitrofurfurylidene)Amino]-4-Imidazolin-2-Ones
IPC: C07D/
Filed: 1968-04-23
Abstract: 1,167,471. Nitrofuran derivatives. NORWICH PHARMACAL CO. 23 April, 1968 [10 July, 1967], No. 19235/68. Heading C2C. Novel nitrofuran derivatives of Formula (I), in which R is a hydrogen atom or a methyl or hydroxymethyl group, are prepared by reacting 5-nitrofurfural with a compound of Formula (II), in which X is a hydrogen atom or a methyl group, to obtain a compound of Formula (I) in which R is a hydrogen atom or a methyl group, and, if desired, when R is a hydrogen atom, further reacting this compound with formaldehyde to produce a compound of Formula (I) in which R is a hydroxymethyl group. Starting materials of Formula (II) are prepared by reacting aminoacetaldehyde diethylacetal or its N-methyl derivative with acetone semicarbazone, and cyclizing the resultant acetone 4 - (2,2 - diethoxyethyl)semicarbazone by heating with a mineral acid. Antibacterial compositions for oral administration comprise a compound of Formula (I) together with a carrier. The compositions for veterinary use may be in the form of a poultry feed containing 0.022% by weight of a compound I.
Patent GB-634413-A (GB)
Title: Electric synchroniser apparatus
IPC: H02P5/52
Filed: 1947-07-18
Abstract: 634,413. Automatic speed control systems. GENERAL MOTORS CORPORATION. July 18, 1947, No. 19244. Convention date, Oct. 25. 1945. [Class 38 (iv)] Synchronizing apparatus for controlling the speed of a prime mover relative to a reference speed, comprises a commutator assembly and an associated brush assembly, one driven by the prime mover and one at the reference speed, the commutator having groups of bars, the bars of each group being connected such that any speed difference between the commutator and brush results in a condenser being charged, then discharged through either a speed-increasing or a speed-decreasing device, and then being short-circuited. As shown, the system is applied to an aeroplane engine wherein control of speed is effected by varying the pitch of the propeller 12 by a speedsetting lever 15 for manual control and an electric servomotor 25 for maintaining synchronism with a fixed speed motor 60. The motor 60 drives a commutator 110, the brush 120 of which is driven by a motor 125 controlled from a generator 127 geared to the engine. The commutator is provided with groups of insulated segments B ... I, the arrangement being such that one or other of the relays 50, 49 is energized by the discharge pulses of a condenser 124 when the speed of the engine drops below or rises above the speed of the motor 60. The relays 50, 49 control the windings 23, 24 of the motor 25 so as to drive the motor in the direction necessary to vary the pitch of the propeller and effect compensation of the engine speed. The pitch changing mechanism may be of the type described in Specification 545,520, [Group XXXIII]. The commutator arrangement is such that when segments B engage the brush 120, the condenser 124 is charged from the battery 36, and the relay 50 or 49 is energized by the condenser discharge depending on whether segments D or I are next engaged by the brush. The speed of the master motor 60 is governed by a centrifugal switch 78 having adjustable contacts 67, 71 shunted across a resistance 79 in the field circuit of the motor. When the departure from synchronism is small, the relays 50, 49 are operated to pulse the motor 25, but the relays are pulled up to operate the motor continuously if lack of synchronism is large. In a multiengine installation, e.g. four engines, each engine is provided with a motor 125 co-operating with an individual commutator 110 driven through gearing from a common master motor 60 (Fig. 4, not shown). In a modification, wherein two engine speeds are maintained equal, the motor 60 is replaced by the second engine.
Patent GB-1009174-A (GB)
Title: Improvements in fastener units
IPC: F16B19/10
Filed: 1962-05-18
Abstract: 1,009,174. Clip fastenings. ILLINOIS TOOL WORKS Inc. May 18, 1962 [June 5, 1961], No. 19296/62. Heading E2B. [Also in Division F2] A fastener for securement in an aperture in a workpiece 34d, Fig. 14, has a head which may have bevelled edges like the head 44f of Fig. 17 for holding a channelled moulding strip, and an expandable hollow shank with an axial pin 40 inside, Fig. 2, for expanding an element 38 when it is driven into the shank over the pin so that the expanded element distends the hollow shank, Fig. 14. The head-and-shank member may be of nylon. The pin may be formed separately from the shank as is the pin 40h in Fig. 20 and have a slot 110 in the resilient material of which it is made so that it contracts to allow the split ring element 38h to be driven over it more easily. A split ring 38c. Fig. 12, may be threaded for engaging a threaded pin 40c or be cup-shaped, Fig. 16, with a helicallyedged hole 88 for engaging a thread on a pin or for cutting a thread on an unthreaded pin. The split ring may be of nylon or spring metal and be larger than the shank bore, Figs. 7-9 (not shown); it may be of spring sheet metal, 38b, Fig. 11. Instead of being split through, the expander element may have slits, to produce a ring of teeth, Fig. 14, around the edge or around the edge of a central hole, or around both as shown, to bite into the shank or pin 40d. The hollow shank may have corrugations 52, Fig. 2, at its end to facilitate distension and these may extend into the concave end wall, Fig. 19 (not shown), of an embodiment similar to that of Fig. 17, in which the shank is polygonal or rectangular in section and two opposed sides 94 only are corrugated for expansion by the spreading of two flexible sections 96, 98 of a rectangular element 38f.
Patent GB-582965-A (GB)
Title: Improvements in or relating to the lubrication of the connecting rod bearings of internal combustion engines and compressors
IPC: F02F3/00
Filed: 1944-10-09
Abstract: 582,965. Lubricating. WANS, J., and RUSTON & HORNSBY, Ltd. Oct. 9, 1944, No. 19326. [Class 12 (iii)] An internal-combustion engine or a compressor has oil. fed under pressure by a rotary pump through a telescoping pipe 16/12 to a passageway 10 in the piston trunk with part passing to a cooling chamber 1 for the piston head and part passing through a bore and radial openings 20 in the gudgeon pin 7 first to lubricate the small end bearing and passing thence by a duct 23 in the connecting rod to lubricate the big-end bearing. The cooling-oil portion returns by a telescoping pipe 13/17. Shock-reducing air vessels may be provided on the fixed members 16, 17 of the telescoping pipes.
Patent GB-911341-A (GB)
Title: Polyacrylonitrile fiber
IPC: C08F220/44
Filed: 1961-05-30
Abstract: <PICT:0911341/IV(a)/1> A polyacrylonitrile fibre, in the as-spun state, is drawn from 1,8-3,0 times its original length in an aqueous bath having a temperature from 85 DEG -100 DEG C.  While the fibre is still in a highly hydrated state, and held at 80 DEG -115 DEG C., a pressure of 9-30 p.s.i. may be applied, transversely to the longitudinal axes of the fibre at a plurality of points along its length, so as to reduce the loop work-to-break tenacity of the fibre whilst substantially retaining its breaking tenacity.  The fibre in the hydrated state may contain 30-55% water, solvent, or water plus solvent. Acrylonitrile homopolymers or copolymers containing at least 85% acrylonitrile and up to 15% of a copolymerizable ethylenically unsaturated monomer may be dry-spun into fibres and treated as above. A copolymer containing also 0,1%-10% of a copolymerizable sulphonic acid or sulphonate salt of said acid may be spun.  A preferred polymer is an acrylonitrile/methyl acrylate/sodium styrene sulphonate copolymer.  Examples of other suitable copolymerizable ethylenically unsaturated monomers are given.  Such a spun fibre may be of denier 13-27, breaking tenacity 1,1-2,0 g./denier, and loop work-to-break value 0,18-0,68 g. cm./denier-cm., the tenacity and loop work-to-break values being within the area a-b-c-e of the Figure when the fibre denier is 13-18, and within the area a-b-d-e when the fibre denier is 19-27.  Specifications 586,881, 765,585 and U.S.A. Specifications 2,743,994 and 2,837,500 are referred to.
Patent GB-805554-A (GB)
Title: Improvements in and relating to barrier layer cells
IPC: H01L21/108
Filed: 1955-07-06
Abstract: 805,554. Selenium rectifiers. VICKERS Inc. July 6, 1955 [July 8, 1954], No. 19482/55. Drawings to Specification. Class 37. A selenium rectifier includes a barrier layer of cadmium sulpho-selenide on the selenium surface. Amorphous selenium is provided on a base-plate of nickel, aluminium, steel, or nickeled steel or aluminium by melting or vaporizing Se on to it, and the layer annealed at a temperature between 200  C. and the melting- point. Cadmium sulphoselenide is then applied, preferably by sublimation in a high vacuum, e.g. less than 11 Á of Hg, at 1000-1200 C. to a thickness of between 0.00001 and 0.001 cm. A preferred composition by weight of the sulphoselenide is Cd 66-73 per cent; S 10-16 per cent; Se 24-11 per cent. A counter electrode, preferably of Sn 30 per cent by weight, Cd 70 per cent by weight is then applied by spraying and the device formed by passing a direct current through it in the high resistance direction.
Patent GB-423711-A (GB)
Title: Improvements in steam and water separators
IPC: F22B37/26
Filed: 1934-07-02
Abstract: 423,711. Preventing priming in boilers. BABCOCK & WILCOX, Ltd., Farringdon Street, London.-(Assignees of Fletcher, J.; 219, Storer Avenue, Akron, Ohio, U.S.A.) July 2, 1934, No. 19503. Convention date, June 30, 1933. [Class 123 (ii)] A separator within a steam and water drum 10 comprises a dry pan formed by a central perforated plate 52 and imperforate side plates 53 extending longitudinally above the water level, an upwardly flaring baffle 62 spaced below the pan with inlets 63 at opposite sides providing a separating space 61. Flanges on the pan plates form a pair of baffles 54 and an upstanding impingement plate 65 is secured between flanges of the pair of plates forming the baffle 62. The perforations 60 in the dry pan are preferably confined to the relatively quiescent end of the drum and outlets 70 to the opposite end in order to lengthen the steam flow path. The separator is particularly adapted for use in a boiler comprising a vertical bank of water-tubes connecting an upper and a lower drum with a laterally adjoining furnace lined with water tubes and separated from the tube bank space for a portion of its length by a water-tube wall, burners in the front wall discharging fuel horizontally and the furnace gases returning in a series of transverse passes through the tube bank space.
Patent GB-508743-A (GB)
Title: Improvements in and relating to electric tracers for copy milling machines
IPC: B23Q35/34
Filed: 1938-07-01
Abstract: 508,743. Electric control systems. BRITISH THOMSON-HOUSTON CO., Ltd. July 1, 1938, No. 19589. Convention date, July 1, 1937. [Class 40 (i)] [Also in Group XXII] In an electric tracer for copying machines of the milling, planing, grinding, &c. type a casing 1 carries a socket 5 for a universal joint 6 on the spindle 3 which is provided at one end with a tracing point 4 and at the other end with an armature 7. This armature co-operates with two diametrically opposed vertical coils 11, 12 arranged in the branches of a Wheatstone bridge and also with two horizontally opposed coils in the branches of another Wheatstone bridge, whereby oscillation of the spindle by the pattern will alter the equilibrium of one or both of the bridges and so actuate relays which control the feed driving motors of the machine. In order to adjust the sensitivity of the control the armature 7 is formed conical and the casing 1 is axially adjustable by means of a screw-thread 10 and locking screw 9 to vary the air gap between the armature and the cores of the coils, or alternatively the casing may be fixed and the coils axially adjustable as a body. If the spindle 3 is also capable of axial copying movement, it carries a second armature on the end 7 co-operating with a coil system separate from the coils 11, 12, &c., for controlling an axial feed motor. Further coils spaced at 45 degrees to the coils 11, 12 may be used for energizing the motors in oblique directions.
Patent GB-350269-A (GB)
Title: Improvement in reclaimed rubber
IPC: C08J11/10
Filed: 1930-06-27
Abstract: In the devulcanization of rubber by treatment with alkali, the rubber is treated during the devulcanizing process with cleavage products obtained from tanned leather, to soften particles of hard stock. Leather is finely ground, and 2-5 per cent is mixed with rubber in the digester.  Alkali is added and steam at 100-200 lbs. pressure is admitted for 12-24 hours.
Patent GB-391339-A (GB)
Title: Electric tubular furnaces
IPC: H05B3/00
Filed: 1932-07-12
Abstract: 391,339. Electric resistance furnaces. JACKSON, L. MELLERSH-, 28, Southampton Buildings, London.-(Siemens- Schuckertwerke Akt.-Ges.; Siemensstadt, Berlin.) July 12, 1932, No. 19713. [Class 39 (iii).] In a pull-through furnace, particularly for bright annealing of steel wire, the metal heating tube through which the current flows is divided into two or more sections of unequal length and resistance, so that the admission section 2 has a lower resistance than the outlet section 3. The sections are fed from separate transformers 6, 12. Both primaries are provided with tappings controlled by hand switches and the transformer 12 is also controlled by a thermostat 22 controlling a switch 17. The heating tube is of chrome nickel steel and the sections may be of unequal cross-section. An inert gas may be supplied to the tube.
Patent GB-940626-A (GB)
Title: Improvements in or relating to adhesive tape dispensers
Inventor: WATERTON LESLIE ERNEST
IPC: B65H35/00
Filed: 1961-06-01
Abstract: 940,626. Tape dispensers. JOHN DICKINSON & CO. Ltd. Aug. 28, 1962 [June 1, 1961], No. 19796/61. Heading A4G. A tape-dispenser has a platform 11 terminating in a cutting-edge 11<SP>1</SP>, the end 11<SP>4</SP> of the platform adjacent the cutting edge being concavely curved to enable the tape to be gripped readily after a piece of tape has been severed on the cutting edge. The concavely curved portion is preferably fluted and the cutting edge may be convexly or concavely curved or straight.